Setting voltage regulator

Information relating to the Matchless G9 or AJS Model 20 500cc twin
Locked
Michael Addis.
Posts: 1
Joined: Wed Jan 01, 1992 12:00 am
Location: CUMBRIA UK

Setting voltage regulator

Post by Michael Addis. »

Can anyone tell me how to set up the Lucas cut out and voltage regulator unit on a 1955 Model 20.
At present the ammeter is showing 'full charge' all the time even when the battery is charged up.
The dynamo is original, but I have fitted a small modern battery into the original battery box.
User avatar
TommoT
Member
Posts: 1602
Joined: Mon Jan 01, 1990 12:00 am
Location: DENMARK

Setting voltage regulator

Post by TommoT »

My workshop manual gives the following figures for the MCR2 unit:

Regulator: contact gap 0.015" setting: 7,4-7,8V at air temp. 20C.
Cut out: top contact gap 0.025-0,030" lower gap 0.018" min.

Data:
cut-in-voltage: 6,3-6,7V
drop-off voltage: 4,5-5,0V
reverse current: 3,0-5,0amps

Hope this helps!

Regards.

Tom M. (TM)
TommoT

Ride Your Motorcycle As If Your Life Depended On It - Cos' It Does!
Locked